This is Sweetie , and she's sending her sister, Mindy PeppurrClaws a sweet little postcard about her mini vacation before they start up work again in the winter :3
These two help Santa with Christmas preparations since he rescued them when they were little kittens. Due to their diet high in candycanes their furs changed accordingly, and they don't gain weight from it (hey they're magic candycanes, why else do you think the elves aren't fat?) Sweetie liked the sweet mint and spearmint ones the most so she turned green, Mindy preferred the plain normal candycanes and she turned red.

Free base>
http://www.furaffinity.net/view/13537446/
(Thanks so much Popcorn_Panic)